钻井液含盐量高,会()。
A、减轻钻具腐蚀
B、加剧钻具腐蚀
C、不腐蚀
D、无法判断
参考答案:B
My family usually ________ at ten in the evening. [ ]
A. have breakfast
B. get up
C. go to bed
D. play the piano
若有定义语句:int x=10;则表达式X-=x+x的值为( )。
A.-20
B.-10
C.0
D.10